Determination of Dissociative Mercury in Mongolian Medicine Shibawei Ouqu Pills

The method for the determination of dissociative mercury contents in the characteristic Mongolian medicine Shibawei Ouqu pills was established, and the technical support for the limited detection of dissociative mercury in the quality standard of Shibawei Ouqu pills was provided. The dissociative mercury is easily soluble in nitric acid, while processed products are insoluble in nitric acid. Then, the content of dissociative mercury in Shibawei Ouqu pills was determined by atomic fluorescence spectrometry using nitric acid as the solvent. The dissociative mercury showed a good linear relationship in the range of 0.1~2.0 μg/L. The regression equation was Y=1 467.197 6X+3.391 5, and the correlation coefficient R² was 0.999 59, the average recovery was 95.0%, and relative standard deviation (RSD) was 4.436% (n=6). The average content of dissociative mercury in Shibawei Ouqu pills was 0.671 mg/g. The method is simple, accurate and reliable, and can be used for the limited determination of dissociative mercury in the study of quality standard improvement of Shibawei Ouqu pills.